code: def test_hierarchy_columnwise_missing_level(self):
      X, y = load_postcodes("binary")
      HIER_cols = [
          "HIER_postcode_1",
          "HIER_postcode_2",
          "HIER_postcode_4",
      ]
      with self.assertRaises(ValueError):
          encoders.TargetEncoder(
              verbose=1,
              smoothing=2,
              min_samples_leaf=2,
              hierarchy=X[HIER_cols],
              cols=["postcode"],
          )
  
imports: import pandas
  from unittest import TestCase
  import tests.helpers
  import numpy
  from category_encoders.datasets import load_postcodes, load_compass
  import category_encoders
label_desc: Use image node_id 20 for calling the TestTargetEncoder obj's underlying member method code with example usage: obj.test_hierarchy_columnwise_missing_level() without return types